JPS6124808B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to an engaging tool such as a buckle for a band, and in particular, one stopper is engaged with the other end so as to cover the other end, and the belt, etc. The present invention relates to an engaging tool using a permanent magnet that allows the tensile forces of the magnets to act at the same level, is easy to engage and disengage, and has a reliable fixing property.

(Prior Art) Conventionally, in the case of a buckle using a permanent magnet of this kind, a hook structure such as a hook directed in the direction of tension of the band has been attached in addition to the attraction force of the permanent magnet.

(Problems to be Solved by the Invention) However, in conventional magnets and hooks, each has a different function, and even when they are installed together, the operability and engagement are not sufficient.

(Means for Solving the Problems) In view of the above-mentioned inconveniences in the past, the engaging tool of the present invention is designed to replace magnetic closed circuit constituent materials such as bands, which are used to effectively draw out the attractive force of magnets. The permanent magnet has a hook structure that corresponds to the tensile force, so that adsorption and tension interact organically with each other, and has a hole 1a extending from one magnetic pole surface a to the other magnetic pole surface b. Ferromagnetic protrusions 2a and 3a protruding from either or both of the ferromagnetic plate 2 attached to the magnetic pole face b of the magnetic pole face b and the ferromagnetic plate 3 detachably attracted to the magnetic pole face a are inserted into the hole 1a. In the engagement tool that is brought into contact with and attracted to each other or to the ferromagnetic plates 2 and 3, a contact plate portion 2b in which the peripheral side portion of the ferromagnetic plate 2 protrudes outward from the magnetic pole surface b of the permanent magnet 1; A part of the corresponding contact plate part 2b is further made into a connecting plate part 2c such as a band protruding outward, and an inverted dish-shaped non-metallic part is fitted from the magnetic pole surface a side of the permanent magnet 1. A magnetic case 6 with a rising peripheral wall 6 of the case 6.
The upper end of a is bent outward to form a plate portion 6c that contacts the contact plate portion 2b of the ferromagnetic plate 2, and a portion of the plate portion 6c protrudes outward to serve as a connection for a band or the like. The inner bottom wall 6e of the case 6 serves as the mounting portion 6b.
The engaging tool is configured such that the ferromagnetic plate 3 is fixedly attached to the ferromagnetic plate 3.

(Function) That is, in the engagement tool according to the present invention, the ferromagnetic protrusion 3a on the ferromagnetic plate 3 constituting the magnetic closed circuit
is used as an engaging member for the hole 1a, and at the same time, the attraction force of the magnet 1 used is utilized for the purpose of maintaining the engaged state of this engaging member while improving the engagement property in the tensile direction. interact with each other to fully function as a buckle.

In addition, with the intention of making the adsorption engagement more reliable with such ferromagnetic protrusions 3a, the circumferential edge of the case 6 is formed into a rising circumferential wall 6a that comes into contact with the ferromagnetic plate 2 surface, and the ferromagnetic protrusions are formed in this part. The ferromagnetic protrusion 3 prevents the formation of a magnetic closed circuit due to leakage magnetism that is difficult to be focused on the ferromagnetic protrusion 3a, thereby increasing its attraction force.
a and the engaging surface facing the pulling direction formed only by the hole 1a is spread over the circumferential surface of the magnet 1 and the entire circumferential surface of the rising peripheral wall 6a, thereby relatively reducing the force of the tensile action per unit.

(Example) An example of a typical engagement tool according to the present invention will be described below with reference to the accompanying drawings. 1 is a ferrite magnet, a rare earth magnet, with a hole 1a opened from the magnetic pole surface a to b; It is a permanent magnet such as a steel bar magnet or a plastic magnet, and a ferromagnetic plate 2 is fixed to one magnetic pole face b of the magnet 1 with a case 4 or the like, and a ferromagnetic plate 3 is attached to the other magnetic pole face a.
ferromagnetic protrusions 2a, 3 protruding from either or both of the ferromagnetic plates 2, 3;
a to the other ferromagnetic plate 2, 3 or the other ferromagnetic protrusion 2
It is designed to be brought into contact with the end faces of a and 3a in a magnetically detachable manner.

Incidentally, the case 4 is usually made of a non-magnetic material, and has a hole communicating with the hole 1a in the closed end surface, and a flange 4a is provided at the end of the opened hole to engage with the end of the hole 1a. A claw 4b is provided on the edge, and the ferromagnetic plate 2 and the magnet 1 are integrally fixed by bending the claw 4b onto the surface of the ferromagnetic plate 2 attached thereto.

In addition, this ferromagnetic plate 2 is extended laterally from the magnet 1, and has a contact plate portion 2b protruding from the side of the case 4, and one end thereof is further extended laterally to form a band, etc. The connecting plate portion 2c is configured to have a connecting hole 2e.

Next, the other ferromagnetic plate 3 has a rising peripheral wall 6 that is fitted from the peripheral side of the magnet 1 and comes into contact with the contact plate portion 2b.
A is made to stand up on the circumferential side, and the rising circumferential wall 6a is further bent laterally to form an abutting plate part 6c, and a part of the plate part 6c is further extended laterally to connect a band or the like. A connecting plate 6b with a hole 6d is fixed to the inner bottom wall 6e of the case 6 in the form of an inverted dish by fitting, attaching, or other suitable methods.

The case 6 has an inverted dish-like engaging recess into which the magnet 1 can be fitted snugly, and it is planned to use a synthetic resin material, ceramic material, etc. other than metal. It is something.

In the embodiment shown in FIG. 4, the ferromagnetic protrusion 3a is omitted and the ferromagnetic protrusion 2a is directly attracted to the ferromagnetic plate 3 to form a magnetic closed circuit. Peripheral wall 6a
It is designed to be locked with a chisel.

In the embodiments shown in FIGS. 3, 4, and 6, a ferromagnetic magnetic shield plate is placed on the free magnetic pole surface for the purpose of preventing destruction of the magnetic recording portion of the magnetic tape or the like that approaches the magnetic pole surface. 5 is attached to prevent magnetic leakage from the magnetic pole surface, and the embodiments shown in FIGS. 5 and 6 are case 4.
The permanent magnet 1 is made of a plastic magnet or the like, and the magnet 1 is directly exposed to the outside, making it easier to manufacture and assemble the engaging tool.

The magnet 1 can be attached to the ferromagnetic plate 2 by using the case 4, or by adhesion, screw attachment, riveting, or other appropriate methods.
Similarly, various methods are planned for attaching the ferromagnetic protrusions 2a and 3a to the ferromagnetic protrusions 2a and 3a, such as staking, welding, spot welding, screw attachment, riveting, nailing, etc.

As described above, in the engaging tool according to the present invention, the non-magnetic case 6 is dish-shaped and engages so as to cover the outer circumferential surface of the other stopper, so the locking force is strong even against the tensile force of a band, etc. The attraction force of the permanent magnet 1 is used only to attract both stops, and has no relation to the tensile force.Also, since the connecting plates 2c and 6b of both stops are on the same level, the tensile force is Since there is no lever-like effect on the magnet, it is possible to downsize the permanent magnet.Furthermore, since the case 6 is non-magnetic, when engaged, the action of the permanent magnet 1 causes the rising peripheral wall of the case 6 to connect to the other side. Smooth suction engagement is achieved without the stopper sticking together and becoming sticky.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an engaging tool according to the present invention, and FIGS. 2 to 6 are sectional views showing each embodiment. 1... Magnet, 2, 3... Ferromagnetic plate, 4... Case, 5... Ferromagnetic plate, 6... Case.

Claims (1)

[Claims] 1. A ferromagnetic plate 2 attached to the magnetic pole surface b of a permanent magnet 1 having a hole 1a extending from one magnetic pole surface a to the other magnetic pole surface b is detachably attracted to the magnetic pole surface a. In the engagement tool in which ferromagnetic protrusions 2a and 3a protruding from either or both of the ferromagnetic plate 3 are brought into contact with and attracted to each other or the ferromagnetic plates 2 and 3 within the hole 1a, A peripheral side portion of the magnetic plate 2 is a contact plate portion 2b that protrudes outward from the magnetic pole face b of the permanent magnet 1,
In addition, a part of the corresponding contact plate part 2b is further made into a connecting plate part 2c such as a band protruding outward, and an inverted dish-shaped non-magnetic case 6 is fitted from the magnetic pole surface a side of the permanent magnet 1. The upper end of the rising peripheral side 6a of the case 6 is bent outward to form a plate portion 6c that contacts the contact plate portion 2b of the ferromagnetic plate 2, and a portion of the plate portion 6c is bent outward. An engagement tool characterized in that the ferromagnetic plate 3 is fixed to the inner bottom wall 6e of the case 6, which protrudes toward the side and serves as a connecting plate part 6b for a band or the like.